Very true Simon.
I would add that, for many, they take away their adulthood, as well, particularly their social skills. They demonize everyone and everything to such a degree that many when they become adults simply don't know how to react to others.
There is ALWAYS an ulterior motive or some ANGLE with "worldly people."
Funny, most of the times I've been ripped off or had to deal with psychological warfare it has been with a JW. Most of my "worldly" friends would bend over backwards to help me out or rejoice with me when there are things I want to celebrate.
Yep, the damage is deep and doesn't erase easily.
Just a thought,
SOP